Next experiments#81
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New /drive-dna page turns a single drive's telemetry into a unique, reproducible radial genome bloom: angle=journey progress, radius=speed, hue=power flow (regen cool / draw warm), lightness=SoC, concentric rings= elevation bands. Derives human traits (Spirited/Mountainous/Regen-rich/ Cold-start), a stable 7-char signature, and an exportable standalone SVG. Pure/deterministic + null-safe engine with co-located tests (5 cases). Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
New /what-if page decomposes a real drive's actual energy into first- principles components (aero ∝ v², rolling, elevation work, climate) plus a measured residual anchored to observed Wh, then recomputes under user knobs: average speed, tire pressure, HVAC on/off, ambient temperature. Shows before/after energy, arrival SoC (pack inferred from the drive's SoC drop), duration, a component breakdown, and a plain-language takeaway. Deterministic, null-safe engine with co-located tests (5 cases). Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
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Reconstruct a vehicle's COMPLETE signal state at any past instant from the
signal_log hypertable, with a DVR-style timeline scrubber.
Backend internal/api/timemachine:
- GET /vehicles/{id}/time-machine?at=<RFC3339> -> DISTINCT ON (field) last
value <= at per field, typed by value_kind; age measured vs the scrub instant
- GET /vehicles/{id}/time-machine/range -> earliest/latest/field_count bounds
- migration 000215: guarded PIT index (safe no-op; 000186 already ships an
equivalent (vehicle_id, field, ts DESC) index)
- table-driven + fake-pool handler tests
Frontend: useTimeMachine hooks + TimeMachinePage (Slider scrubber over
[earliest,latest], presets -1h/-1d/-1w/Now, fields grouped by category with
freshness chips, per-section Skeleton/QueryError/EmptyState).
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
EU-Battery-Passport-aligned tamper-evident certificate (distinct from the
BatteryDegradation analytics page).
Backend internal/api/batterypassport:
- GET /vehicles/{id}/battery-passport -> SoH, capacity, equivalent full cycles,
fast-charge ratio, thermal exposure, A-F health grade, degradation trend,
recommendations, and a SHA-256 provenance_hash over pinned canonical facts
- GET /vehicles/{id}/battery-passport/verify?hash= -> tamper check (recompute)
- migration 000217->000216 tesla_battery_passport_ledger (issued-snapshot audit
ledger); ledger write is best-effort + counted, never fails the read
- pure scoring/hash functions + table-driven & fake-pool tests (golden hash,
determinism, tamper sensitivity, ledger-failure-still-serves)
Frontend: useBatteryPassport/useVerifyPassport hooks + certificate page (SoH
gauge, metric cards, degradation area, thermal bars, provenance hash w/ copy,
JSON export) with per-section states.
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
Attributes a real CO2 footprint to each charging session by the grid carbon
intensity at the hour it charged; tracks lifetime CO2 saved vs a gas car,
scores charging-timing greenness (0-100), recommends the greenest window.
Self-hosted-safe via a seeded 24h diurnal grid curve (no external API).
Backend internal/api/carbon: GET /carbon/intensity (curve + greenest/dirtiest),
GET /vehicles/{id}/carbon/summary (per-session CO2, gas-equiv @0.192kg/km,
saved, green_score, monthly), GET /vehicles/{id}/carbon/recommendation
(greenest window + potential saving). migration 000218->000217 grid_carbon_intensity
table seeded 24 rows (solar midday trough, evening peak). Pure CO2/score/window
functions + table-driven & fake-pool tests.
Frontend: useCarbon hooks + CarbonIntelligencePage (green-score gauge, 24h
intensity area w/ greenest/dirtiest markers, monthly CO2, recommendation card).
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
Forecasts remaining life (days + km), replace-by date, confidence, and status
for HV battery, 12V, tires, brakes, cabin filter — beyond detect-only dashboards.
Backend internal/api/rul: GET /vehicles/{id}/rul (all components) +
/rul/{component} (detail w/ decay forecast series). Battery RUL from an OLS fit
of the SoH trend (rate + R2 confidence) projected to 70% EOL; tires/brakes from
odometer km/day vs nominal life; 12V/filter age-based. migration 000219->000218
component_lifespans table seeded + admin-editable. Pure prognostics fns (LinearFit,
status classify, EOL projection) with table-driven & fake-pool tests; sparse data
=> low confidence, never NaN.
Frontend: useRUL hooks + RemainingUsefulLifePage (next-service banner, per-
component gauges/status, selectable decay forecast w/ confidence band).
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
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